Question

using the table, what is the number of electrons in the calcium atom? * (0.5 points)
element standard atomic notation atomic mass atomic number number of protons number of electrons number of neutrons charge
magnesium
calcium $_{20}^{41}ca$
fluorine 19
phosphorous $_{15}^{31}p^{3 - }$
sulfur 31
oxygen 8 -2
potassium $_{19}^{39}k^{ + 1}$
argon 40
boron 5 0
hydrogen $_{1}^{3}h$
68 98 +6
120 50 +4
7 10 13
$_{13}^{27}al^{3 + }$

Explanation:

Step1: Recall atomic number property

In a neutral atom, number of electrons = atomic number.

Step2: Identify calcium's atomic number

For calcium ($_{20}^{41}Ca$), the atomic number is 20. So number of electrons in neutral calcium atom is 20.

Answer:

20